package com.fqh.controller;


import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.fqh.config.AlipayConfig;
import com.fqh.dto.PayInfo;
import com.fqh.entity.Login;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.Date;

@Controller
public class AlipayController {

    @RequestMapping("alipay.do")
    public void alipay(HttpServletRequest request, HttpServletResponse response) throws IOException {
        String totalPrice = request.getParameter("totalPrice");
        request.getSession().setAttribute("totalPrice", totalPrice);
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);

        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        // 同步跳转
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        // 异步跳转
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

        //商户订单号，商户网站订单系统中唯一订单号，必填
        Date date = new Date();
        long time = date.getTime();
        String timeString = time + "";
        String mills = timeString.substring(timeString.length() - 2);
        String out_trade_no = date.getYear() + (date.getMonth() + 1) + date.getDay() + date.getHours() + date.getMinutes() + date.getSeconds() + mills;
        //付款金额，必填
        String total_amount = new String(totalPrice);
        //订单名称，必填
        String subject = "薄荷园饭店自助点餐系统";
        //商品描述，可空
        String body = new String("food is delicious".getBytes("ISO-8859-1"), "UTF-8");

        // 缓存订单信息
        cachePayInfo(request, out_trade_no);

        alipayRequest.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
                + "\"total_amount\":\"" + total_amount + "\","
                + "\"subject\":\"" + subject + "\","
                + "\"body\":\"" + body + "\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");


        //请求
        String result = "";
        try {
            result = alipayClient.pageExecute(alipayRequest).getBody();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        //输出到页面
        response.setContentType("text/html;charset=utf-8");
        response.getWriter().write(result);
        response.getWriter().flush();
        response.getWriter().close();
    }

    /**
     * 缓存订单信息
     *
     * @param request
     * @param out_trade_no
     */
    private void cachePayInfo(HttpServletRequest request, String out_trade_no) {

        HttpSession session = request.getSession();

        Login user = (Login) session.getAttribute("user");
        String time = (String) session.getAttribute("time");
        String totalPrice = (String) session.getAttribute("totalPrice");
        String tableNum = (String) session.getAttribute("tableNum");
        String orderNum = (String) session.getAttribute("time");

        PayInfo payInfo = new PayInfo();
        payInfo.setUser(user);
        payInfo.setTime(time);
        payInfo.setTotalPrice(totalPrice);
        payInfo.setTableNum(tableNum);
        payInfo.setOrderNum(orderNum);


        request.getServletContext().setAttribute(out_trade_no, payInfo);
    }
}
